How to Build Off-Grid Home Storage System with LiFePO4 Batteries of Different Models
Aug 02, 2024
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Are you familiar or not with off-grid living? We also mention off-grid when referring to RVs, and home off-grid energy storage systems are again highly practical for families in grid-free areas or areas with frequent power outages. When you need to solve a lighting problem during a power outage, it is very practical to build an off-grid system for your home that uses DC energy saving lamps for lighting. Off-grid also known as independent photovoltaic power generation system is not dependent on the grid and independent operation of the system, mainly solar panels, energy storage batteries, charge and discharge controllers, inverters and other components. Used in home energy storage and the need to power household appliances, the use of inverters to convert the battery DC power into AC power for appliances, you can realize the off-grid life, this advantage is usually reflected in the power outage. When building a home solar off-grid energy storage system, a great concern is: what battery to choose and what type of battery to choose? How many batteries to choose? How about the layout and so on a series of questions. Back to the root of the problem, everything depends on your needs, how much energy consumption? How long is the consumption time? Calculating Energy Consumption Depending on the appliances you actually need to access, including laptops, TVs, refrigerators, etc., usually all the appliances or electronic devices used in the home are labeled with the relevant parameters so that you can determine their power. Then estimate the time you use them per day, usually in hours. Then the energy consumption of this appliance can be calculated like this: Daily energy consumption (Wh) = rated power (W) x time of use (hours) The daily energy consumption of each appliance can be added up to get the total daily energy consumption (Wh). Suitable inverters Solar home energy storage also needs to take into account the choice of inverter, as most of the home appliances use alternating current, which necessitates the use of an inverter. The inverter converts direct current (DC) into alternating current (AC), but we have to pay attention to the inverter conversion process there will be energy loss, generally in the form of heat consumption, conversion efficiency is generally 85% -90%, depending on the quality and type of the inverter itself to judge. Why should we consider the conversion efficiency, which involves the choice of battery, choose the inverter to understand its efficiency (%), if it is 85%, then after the inverter, energy loss of 15%, only 85% converted to AC power. How to determine the required inverter specifications? Loads that use AC power. Note here that inverters are generally selected in watts, and here we need to consider the sum of the power of the AC load (W) Finally, the size of the inverter to be selected is the sum of the power of all the AC loads/efficiency (e.g., 85%). Battery selection The choice of batteries depends on your needs, and here we talk about how to choose them. As it is a home energy storage system, it is often a battery bank formed by multiple batteries connected in different ways. 1. Calculate the total daily energy consumption: The sum of all electrical appliances Wh 2. Off-grid time Depending on the actual off-grid time needed, how many days of energy storage are needed without sunlight Total energy requirement (Wh) = total Wh * number of days Battery type There are many types of batteries, how to choose the right one for solar home energy storage? Often we will consider the cost-effective, good performance, more affordable. LiFePO4 battery is a good choice, in addition to the available capacity compared to lead-acid batteries 3 times higher, the volume and weight of the substantial reduction in its service life of up to 10 years of proper maintenance, and even green non-polluting, which is indeed suitable for off-grid life of a good choice. Combined with solar panels, MPPT and other components, an off-grid system can be formed, charging and storing energy when there is sunlight, and supplying power to household appliances when they need to be taken off-grid, to maintain the normal operation of household appliances in the event of a power outage. Tips Considering the connection of battery packs for home energy storage devices, we have the following suggestions, when selecting batteries for series-parallel connection, be sure to understand the battery specifications and precautions, and refer to the manuals that come with the batteries, SANFOU LiFePO4 batteries must come with battery manuals/instructions, if you are not sure about it you can make inquiries before purchasing to learn about the SANFOU Lithium Iron Phosphate series of batteries. To prevent imbalances that could lead to overcharging or undercharging, it is important to use batteries that are compatible in type, capacity, and age. Please follow the guidelines below: A. Same Batteries: Ensure all batteries have the same capacity (Ah) and Battery Management System (BMS) rating (A). B. Same Brand: Use batteries from the same manufacturer, as different brands may have proprietary BMS features that are not compatible with each other. C. Similar Purchase Time: Purchase batteries within a short period of time (preferably within a month) to ensure they age similarly and perform consistently. Choosing the right type of battery enables off-grid living and the ability to light up the night when the power goes out.SANFOU is always introducing a variety of LFP battery types suitable for home energy storage devices, so pick and choose according to your needs! Conclusion If you want to build solar home energy storage, you must calculate your total energy consumption demand, according to the energy consumption to make the right choice of batteries, SANFOU LiFePO4 battery series provides a number of models to choose from, pay attention to the parameters of the components used to configure, in order to realize the good operation of the whole system. Activity As the much-anticipated Olympic Games come to a close, we are offering a variety of special combinations that you can choose from with confidence! From August 9th to the end of August, please pay attention to the activities and discounts provided by SANFOU! |
